Increase Object Selection Accuracy?
It's been a while but I forgot to answer this after I figured it out.

Unfortunately there is a whopping 28 pixel hitbox hard coded in to Blender's selection tools.

I cover my findings here in this post:
Object Selection Accuracy 

But long story short, for some reason this massive hit-detection area is hard-coded giving the user no control over it. Maybe one day in the future... :\